WCTC 4.1.2: Alignment: Setting up AR Trackers
This turorial covers the alignment process in WorkLink Create. Here's a breakdown of the key points:
1. Introduction to Alignment Process:
- Alignment is part of the content placement step in the authoring process.
- Primary sequence in the project is where the content placement step resides.
- There are two visibility modes: Standalone mode and Device mode.
2. Types of Alignment:
- Three types: Surface alignment, Image tracking, and Object tracking.
- Surface alignment is the default, aligning to horizontal or vertical flat surfaces.
- Image tracking uses uploaded PNG or JPEG images and is more accurate on mobile devices.
- Object tracking involves using cameras and sensors to identify 3D geometry.
3. Considerations for Surface Alignment:
- Reliable but affected by transparent or reflective surfaces.
- Default for WorkLink projects.
4. Image Tracking:
- Better on mobile devices due to high camera resolution.
- Requires images with high contrast, detail, and non-symmetrical orientation.
- QR codes can be used as image targets.
5. Object Tracking:
- Utilizes cameras and sensors for 3D geometry recognition.
- Depends on lighting and contrast, suitable for objects with clear orientation.
- Best for objects smartphone-sized to smaller than a full-size pickup truck.
6. Alignment Strategies:
- Aligning to subassemblies for improved accuracy in specific areas.
- Multiple alignment points can be set for different user positions or perspectives.
7. Automatic Alignment Point Switching:
- HoloLens 2 can automatically switch between alignment points based on proximity.
8. Alignment in WorkLink Create:
- Primary alignment during the content placement step.
- AR Trackers window manages alignment types (Surface, Object, Image).
- Pose adjustments for Object Trackers to match user perspectives.
9. Advanced Alignment Options:
- Adjustment knobs for fine-tuning tracker properties.
10. Multiple Trackers:
- Multiple Object Trackers can be set up for testing and refining alignment.
11. Multiple Active Trackers:
- This feature only works on HoloLens 2.
- The HoloLens 2 switches between active trackers automatically based on proximity.
- Trackers can be all of one type or a mix of types (multiple objects, multiple images.)
- Trackers must be "active" for it to work. That is, they must be aligned during content placement. (Place content using tracker one, return to content placement step, place content with tracker 2 or add trackers as needed throughout the instruction.)
- Once two are placed, the HoloLens 2 switches to the nearest one.
Note: Automatically selecting a tracker based on what's in view (i.e. user points at image target 2, the system automatically identifies it as tracker 2 and aligns) is not currently supported. The user must tell the system which tracker to look for by picking it on the content placement step.
12. Image Tracking Setup:
- Image trackers for flat surfaces or overlays, with size considerations.
13. User Interface During Content Placement:
- End users would see available trackers (Surface, Image, Object) during content placement step.
This video provides detailed insights into the alignment process using Scope AR's WorkLink Create, covering various types of alignment and practical setup in the authoring tool.